package com.txooo.library.utils;

import android.content.Context;
import android.os.Environment;
import android.text.TextUtils;

import java.io.File;
import java.math.BigDecimal;

public class DataCleanManager { 
	/** 
	 * * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * * 
	 *  
	 * @param context 
	 */  
	public static void cleanInternalCache(Context context) {
		deleteFilesByDirectory(context.getCacheDir());  
	}  

	/***
	 * 清除本应用的缓存文件以及缓存 
	 * @param context
	 */

	public static void cleanCacheFile(Context context){
		deleteFilesByDirectory(context.getFilesDir());  
		deleteFilesByDirectory(context.getCacheDir());  
	}

	/** 
	 * * 清除本应用所有数据库(/data/data/com.xxx.xxx/databases) * * 
	 *  
	 * @param context 
	 */  
	public static void cleanDatabases(Context context) {
		deleteFilesByDirectory(new File("/data/data/"
				+ context.getPackageName() + "/databases"));  
	}  

	/** 
	 * * 清除本应用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) * 
	 *  
	 * @param context 
	 */  
	public static void cleanSharedPreference(Context context) {
		deleteFilesByDirectory(new File("/data/data/"
				+ context.getPackageName() + "/shared_prefs"));  
	}  

	/** 
	 * * 按名字清除本应用数据库 * * 
	 *  
	 * @param context 
	 * @param dbName 
	 */  
	public static void cleanDatabaseByName(Context context, String dbName) {
		context.deleteDatabase(dbName);  
	}  

	/** 
	 * * 清除/data/data/com.xxx.xxx/files下的内容 * * 
	 *  
	 * @param context 
	 */  
	public static void cleanFiles(Context context) {
		deleteFilesByDirectory(context.getFilesDir());  
	}  


	/** 
	 * * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache) 
	 *  
	 * @param context 
	 */  
	public static void cleanExternalCache(Context context) {
		if (Environment.getExternalStorageState().equals(
				Environment.MEDIA_MOUNTED)) {
			deleteFilesByDirectory(context.getExternalCacheDir());  
		}  
	}  
	/** 
	 * * 清除自定义路径下的文件，使用需小心，请不要误删。而且只支持目录下的文件删除 * * 
	 *  
	 * @param filePath 
	 * */  
	public static void cleanCustomCache(String filePath) {
		deleteFilesByDirectory(new File(filePath));
	}  

	/** 
	 * * 清除本应用所有的数据 * * 
	 *  
	 * @param context 
	 * @param filepath 
	 */  
	public static void cleanApplicationData(Context context, String... filepath) {
		cleanInternalCache(context);  
		cleanExternalCache(context);  
		cleanDatabases(context);  
		cleanSharedPreference(context);  
		cleanFiles(context);  
		if (filepath == null) {  
			return;  
		}  
		for (String filePath : filepath) {
			cleanCustomCache(filePath);  
		}  
	}  

	/** 
	 * * 删除方法 这里只会删除某个文件夹下的文件，如果传入的directory是个文件，将不做处理 * * 
	 *  
	 * @param directory 
	 */  
	public static void deleteFilesByDirectory(File directory) {
		if (directory != null && directory.exists() && directory.isDirectory()) {  
			for (File item : directory.listFiles()) {
				item.delete();  
			}  
		}  
	}  

	// 获取文件  
	//Context.getExternalFilesDir() --> SDCard/Android/data/你的应用包名/files/ 目录，一般放一些长时间保存的数据  
	//Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据  
	public static long getFolderSize(File file) throws Exception {
		long size = 0;  
		try {  
			File[] fileList = file.listFiles();
			for (int i = 0; i < fileList.length; i++) {  
				// 如果下面还有文件  
				if (fileList[i].isDirectory()) {  
					size = size + getFolderSize(fileList[i]);  
				} else {  
					size = size + fileList[i].length();  
				}  
			}  
		} catch (Exception e) {
			e.printStackTrace();  
		}  
		return size;  
	}  

	/** 
	 * 删除指定目录下文件及目录 
	 *  
	 * @param deleteThisPath 
	 * @param filepath 
	 * @return 
	 */  
	public static void deleteFolderFile(String filePath, boolean deleteThisPath) {
		if (!TextUtils.isEmpty(filePath)) {
			try {  
				File file = new File(filePath);
				if (file.isDirectory()) {// 如果下面还有文件  
					File files[] = file.listFiles();
					for (int i = 0; i < files.length; i++) {  
						deleteFolderFile(files[i].getAbsolutePath(), true);  
					}  
				}  
				if (deleteThisPath) {  
					if (!file.isDirectory()) {// 如果是文件，删除  
						file.delete();  
					} else {// 目录  
						if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除  
							file.delete();  
						}  
					}  
				}  
			} catch (Exception e) {
				// TODO Auto-generated catch block  
				e.printStackTrace();  
			}  
		}  
	}  

	/** 
	 * 格式化单位 
	 *  
	 * @param size 
	 * @return 
	 */  
	public static String getFormatSize(double size) {
		double kiloByte = size / 1024;  
		if (kiloByte < 1) {  
			return size + " Byte";  
		}  

		double megaByte = kiloByte / 1024;  
		if (megaByte < 1) {  
			BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
			return result1.setScale(2, BigDecimal.ROUND_HALF_UP)
					.toPlainString() + "KB";  
		}  

		double gigaByte = megaByte / 1024;  
		if (gigaByte < 1) {  
			BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
			return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
					.toPlainString() + "MB";  
		}  

		double teraBytes = gigaByte / 1024;  
		if (teraBytes < 1) {  
			BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
			return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
					.toPlainString() + "GB";  
		}  
		BigDecimal result4 = new BigDecimal(teraBytes);
		return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
				+ "TB";  
	}  


	public static String getCacheSize(File file) throws Exception {
		return getFormatSize(getFolderSize(file));  
	}


	public static String getTotalCacheSize(Context context) throws Exception {
		long cacheSize = getFolderSize(context.getCacheDir());
		if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
			cacheSize += getFolderSize(context.getExternalCacheDir());
		}
		return getFormatSize(cacheSize);
	}


	public static void clearAllCache(Context context) {
		deleteDir(context.getCacheDir());
		if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
			deleteDir(context.getExternalCacheDir());
		}
	}

	private static boolean deleteDir(File dir) {
		if(dir == null){
			return false;
		}
		if (dir != null && dir.isDirectory()) {
			String[] children = dir.list();
			for (int i = 0; i < children.length; i++) {
				boolean success = deleteDir(new File(dir, children[i]));
				if (!success) {
					return false;
				}
			}
		}
		return dir.delete();
	}
}
